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Histograms showing distributions of PPP vertical coordinate error within specific ROTI bins (TECu/mn), with Gaussian (red line) and Laplace (green line) functions fitted to the data. (a) ROTI (TECu/mn) ∈ [0.5, 1.0). (b) ROTI (TECu/mn) ∈ [3, 3.5). (c) ROTI (TECu/mn) ∈ [6, 7).
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